Question

kelly is knitting a scarf for her brother. it took her 1/3 hour to knit 3/8 foot of the scarf. How fast is Kelly's knitting speed, in feet per hour?A
`4 (1)/(2)`B
`3`C
`2(1)/(2)`D
`1 (1)/(8)`

Answer 1

We need to divide the number of foot of scarf knitted by the number of time, in hours, taken.

`\frac{(3)/(8)\text{ ft }}{(1)/(3)\text{ hour}}=(3)/(8)\cdot3\frac{\text{ ft}}{\text{ hour}}=(9)/(8)\frac{\text{ ft}}{\text{ hour}}=(8+1)/(8)\frac{\text{ ft}}{\text{ hour}}=1(1)/(8)\frac{\text{ ft}}{\text{ hour}}`